many months. Anticipating nothing but persecution in every country that acknowledged the spiritual authority of the Pope, he appears to have taken the resolution to dwell in Turkey, and turn Mussulman. On his arrival at the Hungarian frontier, on his way to Constantinople, he was arrested on suspicion of being concerned in the conspiracy of the Counts Nadasdi and Frangipani, which had just been discovered. In vain he protested his innocence, and divulged his real name and profession. He was detained in prison, and a letter despatched to the Emperor Leopold to know what should be done with him. The star of his fortunes was on the decline. The letter reached Leopold at an unlucky moment. The Pope’s Nuncio was closeted with his Majesty; and he no sooner heard the name of Joseph Francis Borri, than he demanded him as a prisoner of the Holy See. The request was complied with; and Borri, closely manacled, was sent under an escort of soldiers to the prison of the Inquisition at Rome. He was too much of an impostor to be deeply tinged with fanaticism, and was not unwilling to make a public recantation of his heresies if he could thereby save his life. When the proposition was made to him, he accepted it with eagerness. His punishment was to be commuted into the hardly less severe one of perpetual imprisonment; but he was too happy to escape the clutch of the executioner at any price, and he made the amende honorable in face of the assembled multitudes of Rome on the 27th of October 1672. He was then transferred to the prisons of the Castle of St. Angelo, where he remained till his death, twenty- three years afterwards. It is said that, towards the close of his life, considerable indulgence was granted him; that he was allowed to have a laboratory, and to cheer the solitude of his dungeon by searching for the philosopher’s stone. Queen Christina, during her residence at Rome, frequently visited the old man, to converse with him upon chemistry and the doctrines of the Rosicrucians. She even obtained permission that he should leave his prison occasionally for a day or two, and reside in her palace, she being responsible for his return to captivity. She encouraged him to search for the great secret of the alchymists, and provided him with money for the purpose. It may well be supposed that Borri benefited most by this acquaintance, and that Christina got nothing but experience. It is not sure that she gained even that; for, until her dying day, she was convinced of the possibility of finding the philosopher’s stone, and ready to assist any adventurer either zealous or impudent enough to pretend to it.

After Borri had been about eleven years in confinement, a small volume was published at Cologne, entitled The Key of the Cabinet of the Chevalier Joseph Francis Borri; in which are contained many curious Letters upon Chemistry and other Sciences, written by him; together with a Memoir of his Life. This book contained a complete exposition of the Rosicrucian philosophy, and afforded materials to the Abbé de Villars for his interesting Count de Gabalis, which excited so much attention at the close of the seventeenth century.

Borri lingered in the prison of St. Angelo till 1695, when he died in his eightieth year. Besides “The Key of the Cabinet,” written originally in Copenhagen, in 1666, for the edification of King Frederic III, he published a work upon alchymy and the secret sciences, under the title of The Mission of Romulus to the Romans.

Inferior Alchymists of the Seventeenth Century

    Besides the pretenders to the philosopher’s stone whose lives have been already narrated, this and the preceding century produced a great number of writers, who inundated literature with their books upon the subject. In fact, most of the learned men of that age had some faith in it. Van Helmont, Borrichius, Kirchen, Boerhaave, and a score of others, though not professed alchymists, were fond of the science, and countenanced its professors. Helvetius, the grandfather of the celebrated philosopher of the same name, asserts that he saw an inferior metal turned into gold by a stranger, at the Hague, in 1666. He says that, sitting one day in his study, a man, who was dressed as a respectable burgher of North Holland, and very modest and simple in his appearance, called upon him, with the intention of dispelling his doubts relative to the philosopher’s stone. He asked Helvetius if he thought he should know that rare gem if he saw it. To which Helvetius replied, that he certainly should not. The burgher immediately drew from his pocket a small ivory box, containing three pieces of metal, of the colour of brimstone, and extremely heavy; and assured Helvetius, that of them he could make as much as twenty tons of gold. Helvetius informs us, that he examined them very attentively; and seeing that they were very brittle, he took the opportunity to scrape off a very small portion with his thumb-nail. He then returned them to the stranger,